Wow, the guy is INSANE. I would be scared and try to get away for the weekend if I could. Take someone with you, an adult? Go to a relatives house, anything. When you said he was 'planning' something for you, with your history with him, my mind goes to bad places. Do you have a security camera set up at your house? Sometimes reading your stories about your xA, I get really scared for you.
Take care and do NOT contact him would be my advice. And a frenemy, I wouldn't trust to 'deliver' any kind of any message.
Take care WTBH.